US Bridges

Grant Ave. over Mill Creek

Good

New Castle County, Delaware · Hockessin · Structure no. 1180 000

Built
2022
3 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
34 ft
1 main span
Daily traffic
99
2023 count
Owner
State
State Highway Agency

About this bridge

Grant Ave. over Mill Creek is a concrete culvert carrying Grant Ave. over Mill Creek in New Castle County, Delaware. It was built in 2022, so it is 3 years old, younger than the Delaware average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 99 vehicles a day, roughly 11% of them trucks, projected to reach 123 by 2042. The structure is 34 ft (10.3 m) long.

CarriesGrant Ave.
CrossesMill Creek
LocationHockessin
RouteCity Street 0
Coordinates39.78485, -75.70018
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating63.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length34 ft (10.3 m)
Longest span34 ft (10.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic99 (2023)
Projected traffic123 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Grant Ave. over Mill Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is Grant Ave. over Mill Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does Grant Ave. over Mill Creek carry?

About 99 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Grant Ave. over Mill Creek?

The structure is 34 ft (10.3 m) long with a longest span of 34 ft (10.3 m).

Who owns Grant Ave. over Mill Creek?

It is owned by the State Highway Agency.